The last time Song Ying'an sent back a letter was a month ago.

At that time, it was raining continuously, and the barbarian army wandering in the hinterland of the Great Yan Kingdom had not consciously blockaded Yonggu City, but now, the latest news came, and the connection between Yonggu City and the rear had been completely cut off.

Zhao Hengyi was not the only one who felt troubled, Song San had obviously already received orders from the Mighty Marquis Mansion and began to make some preparations.

In terms of business, Song San handed it over to Xing Xiaorong in one go, and returned to the Weiwu Marquis Mansion in a hurry, not even having time to meet Zhao Hengyi, leaving only a message for Zhao Hengyi to wait with peace of mind.

Brother Song Ying'an is in crisis, how can Zhao Hengyi settle down and wait passively?

But now Yonggu City will be completely besieged by the barbarian army in a short period of time, and it will be difficult to help.

As for whether Yonggu City can be defended, Zhao Hengyi has some confidence.

With the veteran Zhang Chaoyang in charge, the border army on the front line of Yonggu City is much stronger than the soldiers in other border towns in terms of strength.

The Xuanzi battalion and Zhang Chaoyang's personal guards can be regarded as elite soldiers, and as long as the army is not disturbed when defending the city, they will definitely be able to hold out for a long time.

In Yonggu City, a batch of baggage was received before, it is said that Concubine Chen Niangniang deliberately made a relationship, there are a lot of them, if Zhang Chaoyang chooses Chibi Qingye, it is very likely that the barbarians will take the initiative to retreat.

The disadvantages of the barbarians are as obvious as those of the Great Yan Kingdom, they are conquests based on tribes, there is no unified organizational structure, and the distribution of spoils is even more simple and rude, whoever grabs it is whoever.

The barbarians besieging Yonggu City, once they fall into a situation where they cannot be attacked for a long time, their own military spirit will be unstable.

After all, in the face of a fortified city, it is necessary to fill the city wall with human lives, and the guys of other tribes are wantonly plundering in other places, slaughtering ordinary Han people without danger, and constantly gaining wealth, the barbarians besieging Yonggu City must be dissatisfied!

With Zhao Hengyi's understanding of the barbarians, when it really comes to that time, let alone ordinary soldiers, even the leaders of the barbarians, I am afraid it will be difficult to insist on encircling outside Yonggu City.

Therefore, if you want to solve the danger of Yonggu City, first, you must work together in the city, and second, the imperial court must mobilize a large army to suppress and drive away the barbarians stranded in other areas as much as possible.

The barbarian army does not have a strong organizational structure, which is their hard wound, as long as it is used properly, it may not be possible to drive the barbarians who have broken into the hinterland out of the Great Yan Kingdom.

But even with such a cognition, Zhao Hengyi's heart is still up and down.

Those civil officials who control the government may not lack this knowledge, but what they will do, Zhao Hengyi can't guess.

Whenever a dynasty collapses, there will always be many unthinkable things happening, and even many guys who were originally called dragons and phoenixes in the eyes of the world will do many stupid things.

This is not because the bosses who are in high positions and make decisions are really confused, but because they have experienced hundreds of years of development, various interest groups are intertwined, and they no longer consider issues from the standpoint of national gains and losses.

Selling teammates before the battle, there is no shortage of this kind of operation in Dayanguo.

The mighty Marquis Mansion obviously will not give up Song Ying'an, that Hou Ye Dad must also be trying to find a way to get his baby son out of Yonggu City, there are many similar wealthy lords, after all, since Concubine Chen's younger brother Chen Yongzhong got the title in Yonggu City, there have been a lot of mixed military merits.

Zhao Hengyi didn't know how these big families would save their children, but he had already decided to prepare himself.

In the smelting workshop, they were busy day and night, and the two big workers, Zhang Daniu and Wu Ren, were all working overtime with scarlet eyes.

The stability of tungsten steel is difficult to guarantee under the current conditions, and Zhao Hengyi originally planned to wait until the technology is completely mature, and then large-scale forging of tungsten steel products.

But now I can't take care of it, just produce, and then pick out excellent products, as long as the output is large enough, you can always get enough qualified products.

After the test of suppressing bandits, the conscienceless cannon that left the legend of the mountain god beating the drum around Dangyang County is being built continuously, and now three qualified products have been produced.

The crossbow arrows were refined into more than ten processes by Zhao Hengyi, and the apprentices in the smelting workshop formed an assembly line to manufacture crossbow arrows in large quantities regardless of the cost.

If Zhao Hengyi really needs to take people to Yonggu City to rescue Song Ying'an, then the battle he has to face will inevitably be extremely fierce, and the number of crossbow arrows configured in the past will definitely not be enough.

On a daily basis, both hunting and escorting teams are equipped with five to ten crossbow arrows per person.

In low-intensity battles, these bolts are definitely sufficient, and after the battle is over, the activated bolts can be recovered.

However, if you want to break through the barbarian blockade and go to Yonggu City, you will definitely not have time to recover the crossbow arrows.

Originally, Zhao Hengyi also planned to upgrade the crossbow and cooperate with the arrow box to create a new type of hand crossbow that can shoot continuously, but now he can't take care of it, after all, there are so many craftsmen, and he really can't distinguish people to develop new weapons.

However, before the flood came, the hydraulic hammer forging machine that Zhao Hengyi was preparing to build came into play at this time.

This hammer forging machine only made a hundred-pound tungsten steel hammer, and the lever connected to the back of the hammer head, the really complex core components, those huge gears that can transmit water flow energy have not yet been built due to technical difficulties, but for now, and enough.

Zhao Hengyi made a few pulleys and wound them with ropes to make the semi-finished hammer forging machine into a human model.

Just send a strong man to stand in front of the pulley and keep pulling the rope, so that the lever bound at the other end can constantly swing up and down.

Every time it swings, the tungsten steel hammer will be smashed hard, the landing point will not change, the force is extremely even, and the most important thing is that the person who pulls the rope can come in shifts, and a hammer forging machine comparable to the tireless top blacksmith is made like this!

The tungsten steel that does not meet the standards of the conscienceless cannon is smashed into a flat steel plate by the forging hammer machine, the steel plate does not need to be too thick, it can resist the inferior sword chopping of the barbarians, and after simple processing, it can be made into simple plate armor, and even made into a vest style, which can be worn under clothing, except for the weight, it does not affect the user's flexibility at all.

In the whole production process, except for the final sheet metal that requires experienced blacksmiths, the rest of the apprentices are completely competent!

The entire Elm Bay, under the command of Zhao Hengyi, seems to have turned into a monster that has stimulated vitality, constantly swallowing all kinds of raw materials and sharp weapons.

This monster is still too young now, and with enough time, it will surely grow into a terrifying being that will make the world tremble!

After being busy for several days, Zhao Hengyi dragged his tired body home, he didn't know if everything he did was worthwhile, but if he didn't do this, he didn't know what he should do.

"Husband, you are so tired, you don't know how to take care of your body, if you take it seriously...... If you really want to go to Yonggu City, you should recharge your energy. ”